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Nov 25, 2022
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unstable-book: Add page for the abi_efiapi feature #104793

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23 changes: 23 additions & 0 deletions src/doc/unstable-book/src/language-features/abi-efiapi.md
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# `abi_efiapi`

The tracking issue for this feature is: [#65815]

[#65815]: https://github.com/rust-lang/rust/issues/65815

------------------------

The `efiapi` calling convention can be used for defining a function with
an ABI compatible with the UEFI Interfaces as defined in the [UEFI
Specification].

Example:

```rust
#![feature(abi_efiapi)]

extern "efiapi" { fn f1(); }

extern "efiapi" fn f2() { todo!() }
```

[UEFI Specification]: https://uefi.org/specs/UEFI/2.10/